How many 0.5 mg do you need to equal 1 mg?

To determine how many 0.5 mg doses are needed to equal 1 mg, you need to set up a simple ratio. Since 1 mg is double the amount of 0.5 mg, you would need 2 doses of 0.5 mg to equal 1 mg. In other Words, 1 mg is equivalent to 2 doses of 0.5 mg.